Force dropdown of DataGridViewComboBoxox

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  - 1
    - Dynamic colouring of areas of image Hi all, Could the following be accomplished? I have a image of a map of the world as the background image of a form. The borders between countries are black lines. The countries have no fill colour, the are white. Dependent on some data about a countries I determine the fill colour of a country, say green. Is there a way I can specify a coordinate one my image and have the area (i.e. the country) in which that coordinate lies filled green? To make this work the area that is surrounded by black lines must be recognized by the software as a closed shape, which is not trivial I think. I have hopes that somewhere in .NET there is some pattern recognition algorithm that does this trick for me. Otherwise I probably will have to do a lot work defining all the countries explicitly as polygons,,,, Help would be very much appreciated!! Regards, Henk Tag: Force dropdown of DataGridViewComboBoxox Tag: 117804
  - 2
    - customized GPO I was wondering if there was a way to restrict the games that come with XP through a GPO in AD? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117803
  - 3
    - doubt with grid Hello sir, I have a problem with binding the data . What i need to do is . i have a routine that returns the data from data base . But this routine returns as GSACollectins. Now i want to bind that data to datagrid . Wat are the steps i have to do . Plz Give me response Tag: Force dropdown of DataGridViewComboBoxox Tag: 117801
  - 4
    - Scrolling Menu Hi, I have a menu which shows all the installed fonts on the system. The menu is very big, and it grows too large to fit the current screen resolution, and thus the scroll buttons are automatically added to the top and bottom. I need to implement either of the following 2 solutions: 1. Provide for scrolling of the menu with mouse wheel, or 2. Stop the automatic scroll button from being added at the top, and then implement my own scroll bar in the menu (something like MS Word font selection control) Any idea how i can proceed? Regards, Ankit! Tag: Force dropdown of DataGridViewComboBoxox Tag: 117800
  - 5
    - Is it possible to give a DataGridViewTextBoxColumn cell scroll bar I have a datagridview that is intended for read-only display (no editing whatsoever.) The problem is that one of the fields is bound to a SQL 2000 text field so it is potentially very large. At present I have the grid set up so that the text column has word wrap and displays everything. This might do but I think I can do better. What I would like to do is have rows of a fixed height, with individual text cells displaying scroll bars as necessary. Is this possible with the basic datagridview, or do I have to create a custom column control? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117793
  - 6
    - publish a windows app get server error cannot create folder "_vti_ Hi, When I publish a windows c#.net application using one click publish to a remote server I get the error message above Server Error : Cannot create folder "_vti_pvt" Have you any idea what this is about and how do I get around it. thanx in advance Robert Tag: Force dropdown of DataGridViewComboBoxox Tag: 117790
  - 7
    - Blocking app closing by user Hi My app does a few processes and the app can not be closes mid way. Therefore I want to be able to block any attempt of closing app by user such as by clicking on close (cross) or Alt-F4 and once the app is finished doing what it is doing to close. In other words I need to close the app gracefully. How can I achieve this? Thanks Regards Tag: Force dropdown of DataGridViewComboBoxox Tag: 117782
  - 8
    - fill countries on image with color Hi all, Could the following be accomplished? I have a image of a map of the world as the background image of a form. The borders between countries are black lines. The countries have no fill colour, the are white. Dependent on some data about a countries I determine the fill colour of a country, say green. Is there a way I can specify a coordinate one my image and have the area (i.e. the country) in which that coordinate lies filled green? To make this work the area that is surrounded by black lines must be recognized by the software as a closed shape, which is not trivial I think. I have hopes that somewhere in .NET there is some pattern recognition algorithm that does this trick for me. Otherwise I probably will have to do a lot work defining all the countries explicitly as polygons,,,, Help would be very much appreciated!! Regards, Henk Tag: Force dropdown of DataGridViewComboBoxox Tag: 117778
  - 9
    - ClickOnce on Terminal Services farm Hello, We have a ClickOnce application that one of our clients would like to install in a Terminal Services server farm. The application is installed from a URL and added to the Start menu and uses the .NET 2.0 framework. The ClickOnce application files are stored in the directory C:\Documents and Settings\<username>\Local Settings\Application Data. The issue is that the Local Settings folder is not part of Profile Synchonization (or folder redirection). Their policy is that files in the Local Settings folder are removed when the user logs off. The result is that the application is re-installed each time the user runs the application from the start menu. This is of course unacceptable. I am afraid that the only solution is to have them use an MSI file, but I am looking for other ideas? I have read conflicting reports that there is a way to modify the ClickOnce store on each server? Anyone? Thanks in advance. Glenn Smith Tag: Force dropdown of DataGridViewComboBoxox Tag: 117775
  - 10
    - DataGridView question ... i'm hopeless I'm trying to automatically, using a timer, refresh a DataGridView (see attached code), but i don't succeed to display all rows correctly. I used both FirstDisplayedScrollingRowIndex as well CurrentCell but doesn't work (seeing all rows correctly). The delegate is only meant to call the MainLoop method after all rows are displayed. Please can someone give me some help on this, especially on the DisplayRows method? Many thanks. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; using System.Configuration; namespace DigitalTournamentTracker { public partial class frmMain : Form { DataTable dt = null; public delegate void SimpleDelegate(); int nextView = 0; int counter = 1; public frmMain() { InitializeComponent(); } private void InitializeDataGridView() { DataGridViewRow row = this.dataGridView1.RowTemplate; row.Height = 75; //row.MinimumHeight = 35; dataGridView1.ReadOnly = true; dataGridView1.Font = new Font("Arial", 18, FontStyle.Bold); dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None; //dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.DisplayedCells; dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; DataGridViewCellStyle dgvcsDef = new DataGridViewCellStyle(); dgvcsDef.WrapMode = DataGridViewTriState.True; dgvcsDef.ForeColor = Color.Black; dgvcsDef.BackColor = Color.MintCream; dgvcsDef.Alignment = DataGridViewContentAlignment.TopCenter; dataGridView1.DefaultCellStyle = dgvcsDef; DataGridViewCellStyle dgvcsAlt = new DataGridViewCellStyle(); dgvcsAlt.WrapMode = DataGridViewTriState.True; dgvcsAlt.ForeColor = Color.Black; dgvcsAlt.BackColor = Color.LightGray; dgvcsAlt.Alignment = DataGridViewContentAlignment.TopCenter; dataGridView1.AlternatingRowsDefaultCellStyle = dgvcsAlt; dataGridView1.RowHeadersVisible = false; } private void MainLoop() { MessageBox.Show("Enter MainLoop" + " " + nextView.ToString()); switch (nextView) { case 0: // Display dag wedstrijdplanning nextView = 1; MessageBox.Show("Enter case 0"); SqlCommand command = new SqlCommand("GetDagWedstrijdplanning"); command.Parameters.Add("@xyz", SqlDbType.DateTime).Value = "2007-07-24"; GetRows(command); dataGridView1.DataSource = dt; dataGridView1.Columns[0].HeaderText = "Uur"; dataGridView1.Columns[1].HeaderText = "xxx"; dataGridView1.Columns[2].HeaderText = "yyy"; dataGridView1.Columns[3].HeaderText = "zzz"; dataGridView1.Columns[4].HeaderText = "ttt"; dataGridView1.Columns[0].Width = 100; dataGridView1.Columns[1].Width = 513; dataGridView1.Columns[2].Width = 514; dataGridView1.Columns[3].Width = 100; dataGridView1.Columns[4].Width = 100; //dataGridView1.FirstDisplayedScrollingRowIndex = 0; timer1.Enabled = true; break; case 1: // Display dag uitslagen nextView = 2; MessageBox.Show("Enter case 1"); //command = new SqlCommand("XYZ"); break; case 2: // Display uitslagen per reeks nextView = 0; MessageBox.Show("Enter case 2"); //command = new SqlCommand("GetUitslagenPerReeks"); break; } } private void DisplayRows() { if (dataGridView1.Rows.Count < dataGridView1.DisplayedRowCount(false)) { timer1.Enabled = false; SimpleDelegate simpleDelegate = new SimpleDelegate(MainLoop); simpleDelegate(); } counter++; if (counter * dataGridView1.DisplayedRowCount(false) < dataGridView1.Rows.Count) { dataGridView1.CurrentCell = this.dataGridView1.Rows[counter * dataGridView1.DisplayedRowCount(false)].Cells[0]; } else dataGridView1.CurrentCell = this.dataGridView1.Rows[dataGridView1.Rows.Count - 2].Cells[0]; //counter = counter + dataGridView1.DisplayedRowCount(false); //dataGridView1.CurrentCell = this.dataGridView1.Rows[counter].Cells[0]; //dataGridView1.FirstDisplayedScrollingRowIndex += dataGridView1.DisplayedRowCount(false); //} //else //{ // MessageBox.Show("eee"); // timer1.Enabled = false; // SimpleDelegate simpleDelegate = new SimpleDelegate(MainLoop); // simpleDelegate(); //} //dataGridView1.Refresh(); //SimpleDelegate simpleDelegate = new SimpleDelegate(MainLoop); //simpleDelegate(); } private void Form1_Load(object sender, EventArgs e) { InitializeDataGridView(); } private void GetRows(SqlCommand command) { string sqlConnectString = GetConnectionStringByName("XXXConnectionString"); using (SqlConnection connection = new SqlConnection(sqlConnectString)) { command.Connection = connection; command.CommandType = CommandType.StoredProcedure; dt = new DataTable(); SqlDataAdapter da = new SqlDataAdapter(command); da.Fill(dt); } } static string GetConnectionStringByName(string name) { return ConfigurationManager.ConnectionStrings[name].ConnectionString; } private void button1_Click_1(object sender, EventArgs e) { MainLoop(); } private void timer1_Tick(object sender, EventArgs e) { DisplayRows(); } } } Tag: Force dropdown of DataGridViewComboBoxox Tag: 117772
  - 11
    - Radio button, set label text colour Hi, Can someone please help me with how I change the text colour of the text in the label that comes with a Radio button ? Thanks Niclas Tag: Force dropdown of DataGridViewComboBoxox Tag: 117768
  - 12
    - Copy and Paste Outlook attachments Hello, I have a big problemm with Outlook and vb.net. I'd like to copy attachments form Outlook into my application but I can't find a examples for Copy and Paste. Has anybody some code which shows me how to resolve this problem? Regards! Tag: Force dropdown of DataGridViewComboBoxox Tag: 117767
  - 13
    - URGENT * PLEASE - problem when sending mail - C# - Framework 1.1 Hey all, I have a URGENT problem and I hope someone could help me... scenery: I have a windows app, coded using C# (framework 1.1 - VS2003)... The exe and dlls of the app is are stored in a server, and the clients access this app through a shortcut that points to this. The folder of the app is shared on the network. This app accesses a oracle database. I'm using system.web.mail namespace.. The users/clients can access the app with no problem, everything ok. But when I try to send mails, I get an exception... When I'm debuging the app and running it local, the e-mail is sent, but when I copy it to the server and access the app through the network, i get the error... So here are my question: - What's the name given to this programming model (user/client accessing exes on a server)? - What are the requirements to accomplish this task according to this programming model? - Do the client pcs need something special to send the mail? Thanks for your help and sorry for poor english. Tag: Force dropdown of DataGridViewComboBoxox Tag: 117756
  - 14
    - App remains in processes Hi I have a winform app. When this app is closed it remains under 'Processes' in Task Manager. What is the problem and how can I ensure that app closes completely and releases all resources? Thanks Regards Tag: Force dropdown of DataGridViewComboBoxox Tag: 117755
  - 15
    - ReportViewer winform control? Does anyone know if there's a way to override the cursor on the winform ReportViewer control? Currently, it wasn't to change to the hourglass even when the report viewer isn't actually doing anything yet. I want it to be Cursor.Default. The ReportViewer control has properties that suggest that you can change this, but it doesn't appear to actually do it. Tag: Force dropdown of DataGridViewComboBoxox Tag: 117752
  - 16
    - DataGridView custom header row advice needed Hi I need to modify the header row of the DataGridView control. I don't want to change the current column headers but I need to add a kind of sub header row which will contain a couple of function buttons for changing the contents of a column. For example one of the column functions should allow a user to click a button which changes the values of all rows within a column to the value in the first cell. My question is what are my best options to allow for this? I have considered deriving from DataGridViewColumnHeaderCell but this seems a lot of work partly because I don't want to change the functionality of that type. I want to add a row underneath which is not data bound and always stays underneath the header row. I'm new to windows forms but have plenty of .net knowledge. I tried to find some examples/tutorials of modifying the DataGridView but have found very little. Any help or advice appreciated. Thanks Andrew Tag: Force dropdown of DataGridViewComboBoxox Tag: 117751
  - 17
    - I started a robocopy on friday using the /z switch.... The source machine was rebooted in the middle of the copy. I was hoping to be able to start the copy over again from where it left off. Instead of it copying, I get an error message the the source file is in use. This happes regardless of whether I copy the file to another directory. I did change the name of the file and it copies fine. 1) why is the source file now in use by another program? 2) does the /z switch only work for the same session of robocopy? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117750
  - 18
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  - 19
    - who 'eats' my mouse click messages? Hi, I have a simple form with a simple button that does the following: static int button1Count = 0; void button1_Click(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine((button1Count++).ToString() +" Button1 - click"); System.Threading.Thread.Sleep(3000); System.Diagnostics.Debug.WriteLine("End Sleep"); } As you can see, when I click the button, it writes something to the output window and sleeps for 3 seconds. Then, it writes another line to the output window. Now, I do the following: I press 3 times quick enough that it takes less than 3 seconds. I notice that sometimes the button get pressed 3 times and sometimes, only twice. It looks like the messages are 'eaten' somehow... Can someone explain this? I tried to look for an explanation but failed to find such. Thanks in advance, Alon. Tag: Force dropdown of DataGridViewComboBoxox Tag: 117748
  - 20
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  - 21
    - Design view NOT displaying controls Editing an existing windows application, in Visual Studio 2005, which has several panels. Text boxes & labels, associated with some of the panels, only show up as outlines in the Design view. Their actual text is not displayed. What could cause this? One thing that these controls have in common, is that their parent panel, is not the first panel. Those labels that refer to the primary panel, do show up in the Design view. Tag: Force dropdown of DataGridViewComboBoxox Tag: 117741
  - 22
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  - 24
    - Images Do Not Show Up for TreeView Good afternoon. This had been working for several weeks, but something's changed and now my images are no longer visible in my TreeView! I've confirmed that the image file is in place and loaded correctly. I've confirmed that the ImageList is valid. I can reference imageList.Images[x] and access my icons just fine. However, if I add nodes to a TreeView and set their ImageIndex and SelectedImageIndex properties, I still see blank white. This persists whether the nodes are selected or not. It's not merely referencing the 0th element of the list, which had been blank white: for testing I made non-white. If the ImageList is valid, and the nodes' image indices are set, is there some obscure setting in TreeView that I need to enable display of images? Any ideas are appreciated! Code: ImageList imageList = new ImageList(); //imageList.ColorDepth = ColorDepth.Depth32Bit; // Has no effect imageList.ImageSize = new Size(20, 20); imageList.Images.AddStrip(global::MyNamespace.Properties.Resources.My_Icons); TreeTemp.ImageList = imageList; for (int j = 0; j < 4; j++) { TreeNode node = new TreeNode(j.ToString(), j, j); TreeTemp.Nodes.Add(node); // Show as blank white } TreeTemp.Invalidate(); // No effect BackgroundImage = imageList.Images[0]; // Displays test graphic as expected Tag: Force dropdown of DataGridViewComboBoxox Tag: 117736
  - 25
    - Concurrency error handling Hi I have asked this question before but have not received any clear answer. I have a winform app with bound controls via dataadapter/dataset combination.I have a dbconcurrency exception ex. Now I have the following; DataRow = ex.Row DataTable = ex.Row.Table DataColumns = ex.Row.Table.Columns DataSet = ex.row.Table.Dataset How can I now via code, do the following; 1. Make a copy of the datarow, 2. Re-read the row from datasource, 3. Update read row with values form row copy. Any help woudl be appreciated. Many Thanks Regards Tag: Force dropdown of DataGridViewComboBoxox Tag: 117735
- Next
  - 1
    - Drawing In my application I'm doing some drawing in my OnPaint routine using Graphics->DrawRectangle. The rect bounds are constant and not scaled in anyway. One of our Chinese customers is seeing the rectangles appear in the wrong place. When I started investigating this I found that I got the same problems if I changed my Windows DPI settings from 96 to 120. However the customer tells me that they are using 96 DPI. Are there any other settings which could cause this problem? They say it's the same whatever screen resolution they use. Also is there anyway to calculate the rectangle positions such that they will always be write no matter what the users Windows settings are? TIA, KK Tag: Force dropdown of DataGridViewComboBoxox Tag: 117733
  - 2
    - Winforms Tree View Control Hi, I am working on .NET 2.0 Winforms Tree View Control. I need to have the text formatting for the Tree View nodes: 1. I should be able to right/left align the text. 2. I should be able to put some color only for part of the text. Please note the requirement is to do this in code but not at run time. If you have any helpful links please let me know. thanks, Joy Tag: Force dropdown of DataGridViewComboBoxox Tag: 117732
  - 3
    - Disable DataGridView Combobox cell I have a databound DataGridView which has five columns and two of which are ComboBox columns. I want to disable one combobox cell in a row depending upon the selection in the other combobox cell. I cannot find a way to disable the Combobox cell for a row in a grid. Any help would be appreciated. Thanks Tag: Force dropdown of DataGridViewComboBoxox Tag: 117728
  - 4
    - app start & logon form 1. What I need is to start an existing app and provide a pop-up with the user name and password. 2. I've observed its permitted to start the app with either shell or shellExecute. 3. What's the procedure to have the app filehandle be aware of the logon form. 4. FYI I do not have source code for the app. thx., EP. Tag: Force dropdown of DataGridViewComboBoxox Tag: 117727
  - 5
    - Lining up external combobox with datagridview column Hi I'm very new to windows forms. I want to use a comboBox to do I kind of 'change all' on some datagridview columns cell values. i.e. The user selects a value in the dropdown and it changes all the cell values in the column it applys too. AutoSizeColumnsMode is Fill so I would like to lock the comboBox to the column that it should apply too. What options do I have? Many thanks Andrew Tag: Force dropdown of DataGridViewComboBoxox Tag: 117723
  - 6
    - ContextMenuStrip Bug?? VB.NET 2005 SP1... I have two drop down items on a contextmenustip: DropDown1 (Enabled) DropDown2 (Disabled) If i hover over dropdown1 to see the items, and then hover over dropdown2 it will show the items and fire the dropdown event which can crash the app as I expect the dropdown event only to fire if the menu item is enabled. If I don't hover over DropDown1 first it behaves as expected. Is this a bug, or should I be doing something different? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117721
  - 7
    - NumericUpDown I need to change the behaviour of NumericUpDown (compact framework 2.0) so that I can show a dialog stating that the value is not within the allowed range rather than just capping the input value. Any ideas how I can achieve this? I don't seem able to find a suitable place to hook into (pre set-value). Thanks Pete Tag: Force dropdown of DataGridViewComboBoxox Tag: 117718
  - 8
    - TreeView Event Can anyone tell me how can I register the "onDoubleClick" on the last node of each level of a TreeView. I use C# as programming language. Thanks George Tag: Force dropdown of DataGridViewComboBoxox Tag: 117717
  - 9
    - NullReferenceException in Windows.Forms.Label? One of the users of my application is reporting the following crash. The stack trace looks like it's all internal to the Framework, so any ideas on what this might be? I've never had the error myself and am not really sure what to suggest... System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.Label.CreateTextFormatFlags() at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) Tag: Force dropdown of DataGridViewComboBoxox Tag: 117715
  - 10
    - Odd query failure I'm writing a Winforms program in VB (Dot Net 2.0, VS2005) using a SQL Server 2000 database. I'm not sure whether I have a programming bug or a sql problem. I can't get a 'Like' query to work. I have a dll with an xsd. I dragged 2 fields from the Server Explorer onto the xsd. I then created a second query for a Like search. (I've probably used this basic technique hundreds of times on this job but I rarely use the 'Like' command.) This runs perfectly in the Query Builder. The query is as follows: SELECT serial, cnst FROM dbo.micro WHERE (serial LIKE @serial + '%') where 'serial' is the primary key, Char 11. 'cnst' is char 10 - null permitted. I have a data management layer which inherits the xsd. In that I created a pair of functions to fill the default 'micro' table: Public Sub FillMicro() Dim da As New DataManager.dsMicroScheduleTableAdapters.microTableAdapter Try da.Fill(micro) Catch ex As Exception MsgBox("Error Message") End Try End Sub Public Sub FillMicro(ByVal vsJobno As String) Dim da As New DataManager.dsMicroScheduleTableAdapters.microTableAdapter Try da.FillByLikeQuery(micro, vsJobno) Catch ex As Exception MsgBox("Error Message") End Try End Sub So, the first function FillMicro() works. The second, FillMicro(jobno) returns nothing, even though there should be about 1200 rows. I'm not getting any error messages or crashes. It just returns 0 rows. I'll probably find the bug 5 minutes after I post this but for now I'm stumped. Anyone see anything wrong with this? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117713
  - 11
    - Can't remove highlighting when cursor is moved When I am editing code in VB.Net 2005 and I move my cursor, the code between where I was and where I now am stays highlighted. Pressing ESC does nothing. In order to continue, I must close the window and begin again, but as soon as I select text, the problem occurs again. I don't have this problem in the VB6 IDE or in Word. I have a second machine that uses the same mouse and keyboard through a switch and I don't have the problem in VB.Net on the second machine, so it's not the mouse or the keyboard. I need to be using the machine that's having the problem. Has anyone seen this before? If so, how do I fix it? Thanks in advance, Carol Tag: Force dropdown of DataGridViewComboBoxox Tag: 117712
  - 12
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  - 13
    - Odd sizing problem I'm writing a Winforms app (Dot Net 2.0, VS2005, VB). I have a simple usercontrol with 2 panels on it, one with labels, one with a variety of editing controls, mostly datetimepickers and NumericUpDowns. A number of these usercontrols are then instantiated and put on a form in another project. The problem is this: The panel containing the controls is apparently expanding and increasing the space between controls, both height and width (so that part of it is hidden when the control displays). There is code that changes the width of the usercontrol itself and the position of the panel within the usercontrol, but no code whatever to change the width of the panel or height of anything. Autosize for the panel is False. What could I be forgetting? Tag: Force dropdown of DataGridViewComboBoxox Tag: 117702
  - 14
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Any help would be appreciated:

Is it possible to programmatically force a datagridviewcombobox to
open its dropdown?

The reason is, I have to click twice one the cell to make it drop
down:
one to get focus and the next click to drop down. I want it to drop
down at the moment it gets focus.

Regards,
Henk

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Re: Force dropdown of DataGridViewComboBoxox by hvj

hvj
Sun Jul 27 07:32:17 CDT 2008

On 24 jul, 20:11, h...@paralax.nl wrote:
> Any help would be appreciated:
>
> Is it possible to programmatically force a datagridviewcombobox to
> open its dropdown?
>
> The reason is, I have to click twice one the cell to make it drop
> down:
> one to get focus and the next click to drop down. I want it to drop
> down at the moment it gets focus.
>
> Regards,
> Henk

Setting datagridview.EditMode = EditOnEnter did the trick. Now I only
have to click once for dropdown.

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